Holley Carb/squirters+jets ?

How did you get that vacuum reading? In gear or in park?

1st of all your motor idles on the idle circuit, thats what the air idle screws are for. The PV richen's the system when vacuum drops below a certain point like cruising down the highway and going up a hill so you don't have to use as much pedal. It also richens up the system when you nail it so the jets have time to get the main circuit going. The squirter's help the transistion between going off the idle circuit to the main circuit under normal driving conditions. Now when you nail it a bunch of stuff happens at once.

You have a lot of squirter up front!! :shock:

give me some more info like motor specs, weight, gear ET's etc